Sentences with phrase «ozone hole opens»

The ozone hole opened the world's eyes to the global effects of human activity on the atmosphere.

A publication by the conservative think tank, The Cato Institute, argued that NASA's 1992 warnings of a potential ozone hole opening up over the Northern Hemisphere «were exquisitely timed to bolster the agency's budget requests» (Bailey, 1993).

Not exact matches

In October 1983, Farman discovered that a huge hole had opened up in the ozone layer over Antarctica — and that it was man - made.

The researchers tracked the yearly opening of the Antarctic ozone hole in the month of September, from 2000 to 2015.

Solomon and her colleagues believed they would get a clearer picture of chlorine's effects by looking earlier in the year, at ozone levels in September, when cold winter temperatures still prevail and the ozone hole is opening up.

The largest ozone hole ever seen has opened up over Antartica, a sign that ozone - depleting gases churned out years ago are just now coming to their peak, NASA scientists reported September 8, 2000.

Another is almost certainly the infamous ozone hole that opened up over Antarctica in the 1980s, and which is still there.

Their measurements, focusing on a time period in September each year — during which time the colder temperatures in the atmosphere promote the reactions that destroy ozone so that the hole is opening up — show that since 2000, the hole has shrunk by 1.7 million square miles, an area more than half the size of the continental United States.

HFC's are cousins to chlorofluorocarbons (CFC's) and hydrochlorofluorocarbons (HCFC's), two other classes of refrigerants which are being eliminated under the Montreal Protocol, a 21 - year old treaty signed by 195 nations to control the gases that opened up a hole in the earth - protecting ozone layer of the atmosphere.

Nevertheless, even the potential for drastic ozone loss is scary enough to warrant a lot more research — and since nobody knows how soon an ozone hole might open up over New York or Chicago or Miami, it makes sense to get on it.

Those truths of the historic situations regarding CFCs and the ozone hole, tobacco and cancers, and sulfur and nitrogen emissions and acid rain bear repeating over and over in contact with the media as an opening gambit in countering the usual septic memes.

In the southern hemisphere the Ozone Hole boundary is being held open by the eccentric South Magnetic Pole, and Antarctic sea ice expands to match that latitude.